<template>
  <el-container class="home-container">
    <!-- 头部区 -->
    <el-header>
      <img src="../assets/xin.jpg" alt="" />
      <span>后台管理系统</span>
      <el-button type="info" @click="logout"> 退出 </el-button>
    </el-header>

    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <!-- 按钮折叠或展开 -->
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409fff"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单模板区 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <template>
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右主题区 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      //左侧菜单数据
      menuList: [],
      iconsObj: {
        125: "el-icon-user-solid",
        103: "el-icon-s-goods",
        101: "el-icon-s-order",
        102: "el-icon-s-open",
        145: "el-icon-s-opportunity",
      },
      //是否折叠
      isCollapse: false,
      //被激活的链接地址
      activePath: "",
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  methods: {
    logout() {
      //清空sessionStorage
      window.sessionStorage.clear();
      //重新返回登录页面
      this.$router.push("/login");
    },
    //获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");

      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
      console.log(res);
    },
    //点击实现菜单的折叠和展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    //保存链接的接受状态
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath = activePath;
    },
  },
};
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;

  img {
    width: 50px;
    height: 50px;
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: 1px;
  }
}
.el-main {
  background-color: #eaedf1;
}
/* .i {
  margin-right: 50px;
} */
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 20px;
  color: #fff;
  text-align: center;

  cursor: pointer;
}
</style>